#1389 improves the testing infrastructure and it seems that with enough "luck", by which I mean a good order of tests or their combination, all tests even pass. However, in practice, it's not very repeatable or reliable.

This issue is about getting the tests run reasonably reliably on both Mac and Windows. There are still debt items mentioned in #1284 like the "temporarily" disabled ActivationDeactivationTest and ThemeCustomizerTest which are out of scope of this issue.

• Review Docker stack startup & waiting – @pavelevap has reported that some of the tests are reporting errors (E, not F) as for example database is not ready yet.
  • Resolved by run-tests.ts, New run-tests.ts, making test runs more reliable #1401.
• Make npm run tests pass.
  • With improved test runner New run-tests.ts, making test runs more reliable #1401 and a workaround for cloneLooksExactlySameAsOriginal Fresh site setup before CloneMergeTest (workaround) #1410, all tests now pass. 🎉